Torch Down Modified Bitumen: Costs, Lifespan and Alternatives

Sunset District sits in San Francisco County and takes salt air off the water, long marine-layer mornings and slow-drying north slopes. In practice that means fasteners and flashing corrode before the covering does, so fixing specification matters more here than material choice.

Granules in the gutters, curling tabs, repeat stains in the same ceiling after every storm, and soft spots underfoot. In Sunset District, fasteners and flashing corrode before the covering does, so fixing specification matters more here than material choice.

A full replacement in Sunset District is permitted and inspected through the San Francisco Department of Building Inspection. Small repairs generally are not, but the layer count and assembly are checked on any permitted job.

Check the licence, liability cover and workers' compensation, then ask any Sunset District contractor what happens if the deck is worse than expected — and get that answer in writing before the covering comes off.

Pitch and exposure decide it before appearance does. Given coastal conditions in Sunset District, salt-rated fixings and sealed flashing details earn their keep.

One to three days on a typical Sunset District property, depending on size, pitch and how much deck needs replacing. Nothing is left open overnight.

In coastal conditions, composition shingle runs roughly fifteen to twenty-five years, tile underlayment twenty to twenty-five, and coatings seven to fifteen depending on the system.

Two visits a year: clear valleys and gutters before the rains, then check flashings after the first real storm. In Sunset District that matters most because fasteners and flashing corrode before the covering does, so fixing specification matters more here than material choice.